Kota Batu, The Old Ruling Centre of Brunei

Kota Batu (literally translated as the stone fort or stone city), 

the centre of rule for Brunei in the olden days.

Covering an area of 120 acres, it functioned from the 14th century to 17th century AD.

http://artmelayu.blogspot.com/2010/11/kota-batu-pusat-pemerintahan-lama.html

One of the main remains of Kota Batu which could be seen is 

what is called Tapak (Site of) Kota Batu I.

http://artmelayu.blogspot.com/2010/11/tapak-site-of-kota-batu-i.html

Besides Tapak Kota Batu I (look at Tapak (Site of) Kota Batu I ) there lies an old graveyard.

http://artmelayu.blogspot.com/2010/11/perkuburan-lama-old-graveyard-of-kota.html